Proximal Renal Tubular Acidosis (Fanconi syndrome) Induced by Apremilast: A Case Report

Apremilast is a recently developed phosphodiesterase 4–inhibitory medication approved for use to treat psoriasis and psoriatic arthritis. We report a case of Fanconi syndrome and proximal renal tubular acidosis that was associated with this medication. Our patient was started on treatment with apremilast 2 weeks before his admission. On arrival, laboratory test results were significant for hypokalemia, hyperchloremic metabolic acidosis, low uric acid concentration, positive urine anion gap, and proteinuria, which resolved on discontinuation of the drug.

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